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Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,
英语听力文摘 English Digest
AS IT IS 2015-07-14 Silica Sand Mining Worries Communities 美国硅砂矿引发社区担忧 The United States is increasing production of oil and natural gas through a process known as fracking. This process is sometimes called hydraulic fracking be
2015年VOA慢速英语(七)月
Hey there fear I've seen you here before You keep coming back And knocking at my door For so long, so long I've been trying to soar With my hands tied up and my feet held to the floor But I'm feeling like a breakthrough is coming I can see that a bre
节奏布鲁斯
Wang Yifang, from the Institute of High Energy Physics of the Chinese Academy of Sciences, attended the award ceremony of the 2016 Breakthrough Prize in Fundamental Physics at the NASA Ames Research Centre. He is the director of the team behind China
2015CRI中国国际广播电台
AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin
2018年NPR美国国家公共电台12月
今天我们要学的词是breakthrough。 Breakthrough, 是突破的意思。最近，加拿大的一组科研人员发现了一种独特的基因，可以阻止癌细胞繁殖，发展成为肿瘤。They made a significant cancer breakthrough, 他们
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